Air conditioning apparatus



Aug. 2, 1938. M. KALISCHER AIR CONDITIONING APPARATUS Fil ed Dec. '14, 1955 5 Sheets-Sheet 1 muzuuum 9394 m mm .223 mommmmmzou No.52

o INVENTOR MILTON KnuscHse ATTOR EY 1938- M. KALISCHER 2,125,727

AIR CONDITIONING APPARATUS Filed Dec. 14, 1933 3 Sheets-Sheet 2 s-mn-rma RELAY C NDENSER MOTOR COMPR UNIT COOLING WATER COOLING WFITER ONDENSER Fla. 2 FIG. 3.

WITNESS ES: INVENTOR (5' MILTON KHLISCHER ATTO EY Aug. 2, 1938; M. KALISCHER AIR CONDITIONING APPARATUS Filed Dec. 14, 1933 3 Sheets-Sheet 5 fvlwrl,

mm wv mv INVENTOR MILTON KFILISCHER WITNESSES: 6. 76

ATTOR; Y

Patented Aug. 2, 1938 i 2,125,727

UNITED STATES PATENT OFFICE- AIR CONDITIONING APPARATUS Milton Kalischer, Springfield, Mass, assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania 7 Application December 14, 1933, Serial No. 702,376

10 Claims. (Cl. 62129) My invention relates to air conditioning appacasing and disposed in the inlet opening it to ratus, more particularly to a unit air conditioner eiiect circulation of air inwardly through said of the self-contained type, that is, an air concliopening. A vertical plate 20', disposed between tioner including the refrigerantliquefying means the fan and the evaporator and in alignment with as part of the unit, and it has for an object to the axis of the fan, is provided to remove the 5 provide improved apparatus of the character set rotary movement imparted to the air by the fan. forth. The evaporator coil 14 is arranged obliquely In accordance with my invention, I provide a in the chamber l3, one end thereof being disposed casing or cabinet containing a refrigerating unit, adjacent the corner of the walls containing the including a compressor, a motor for driving the inlet and the outlet, and the other end being dis- 10 same, and a condenser, in one compartment and posed in the diagonally-opposite corner. As seen an air-cooling heat exchanger in another com in Fig. 1, the coil l4 extends from a point adjapartment. Preferably, the compressor and an cent the upper right hand corner to the lower electric motor driving the same are enclosed in left hand corner. The coil It includes tubes 2! 15 a fluid tight or hermetically sealed casing. I proextending lengthwise of the coil and heat transfer 15 vide awater-cooled condenser, which is in the fins or plates 22 extending at right angles to the form of a double tube coil encompassing the tubes and fixed thereon in heat-exchanging conmotor-compressor unit and is preferably carried tact to provide extended heat-transfer surfaces. thereby. I may also provide a coil for cooling In this position of the coil I4, the fins 22 extend the motor, said coil using the cooling water disin a direction intermediate the horizontal direccharged from the condenser. The motor-comtion in which the air enters through the inlet and pressor unit may be mounted within the casing the vertical direction in which the air leaves on springs to absorb vibration. through the outlet. The fins 22 may also be de- Fig. 1 is a vertical longitudinal sectional view scribed as disposed roughly parallel to, or within 25 of the unit air conditioner; a small angle of, a line extending from the center 5 Figs. 2 and 3 are end views of the air condiof the inlet to the center of the outlet, or as distioner, as seen from the left and the right, reposed approximately at right angles to a plane spectively, of Fig. 1; and bisecting the angle between the walls having the Fig. 4 is a plan view of the refrigerating unit, inlet and outlet. It will also be noted that the showing the motor compressor unit and the conlower edges of the fins extend obliquely across 30 denser. the horizontal air stream coming from the inlet,

Referring now to the drawings more in detail, in which position they are adapted to intercept I show, at Ill, 8, unit air conditioner of the selfthe air. contained type. The conditioner l0 includes an As seen in Fig. 1, the air is caused to flow from inner casing II, in which most'of the apparatus the inlet l8 horizontally to the left. As the air 35 is mounted, and an outer casing. The inner strikes the lower edges of the fins, said fins, becasing includes an upper chamber l3 containing cause of their angular position described above, the air treating apparatus, which in this case is cause the air to flow upwardly and somewhat to an evaporator coil I4 for cooling the air, and a the left, thereby assisting in changing the direc- 40 lower chamber l5 containing a refrigerating unit tion of air flow from horizontal movement 40 I6 which provides a supply of refrigerant for through the inlet, to vertical movement through the coil H. The chambers l3 and I5 are sepathe outlet l9. A sheet metal member 23 attached rated by a partition I], which preferably includes to the inner casing ll serves to further change a heat insulating material. Fiber board insulatthe direction of the air to vertical direction and ing material, such as Celotex, is well suited to to guide the same to the outlet l'9. In flowing 45 this purpose, since it is also a sound-deadening in contact with the fins 22 and with the tubes material. Similar material may also be placed 2|, the air gives up some of its heat and is cooled,

on the side and bottom walls of the lower chamand usually also dehumidified.

ber l5 for heat and noise insulation. The outer casing is provided with an inlet' The upper chamber 83 has an inlet opening l8 opening 23 and an outlet opening 24 arranged 50 in one side thereof, preferably one of the narrow substantially in registry with the inlet opening I8 sides or-ends of the chamber. The chamber I3 and the outlet openirig i9 of the inner casing, is further formed with an outlet opening l9, prefrespectively. A filter 25 for cleaningthe air and erably, as shown, in the upper wall thereof. A a grille 26 are positioned in the outlet opening 24.

. spring mounted fan 20 is carried by the inner The refrigerating unit l6 includes a motor compressonunit 21 and a water cooled condenser 23. The motor compressor unit is preferably ention of the casing 29. Since the detail construc- 15 tion of the motor compressor unit is not involved in this case further than pointed out above, it will not be further described herein. The vaporized refrigerant to be compressed is conveyed to the motor compressor unit through a conduit 20 3| and compressed refrigerant is discharged therefrom into a conduit 32.

' The condenser 28 comprises a double tube coil, as indicated on the drawings, which is helically wound about the end .portions of reduced diam- 25 eter of the motor compressor casing. A fitting 33 is provided at one end of the condenser. The

conduit 32 is connected to the fitting 33 to adr mit compressed-refrigerant to the condenser, said refrigerant being admitted to the annular 30 space between the inner tube 30 and the outer tube 30'. The inner tube 30 contains cooling water, the cooling water being discharged from the condenser at the fitting 33. The opposite end of the double tube coil forming the condenser 35 28 is connected, as shown in Figs. 1 and 3, to a liquid receiver 34 carried by the inner casing ll. As shown particularly in Fig. 3, the outer tube 33 is connected directly to thecasing forming the liquid receiver, so that the condensed re- 40 frigerant is admitted directly into the liquid receiver. The inner tube 30 containing cooling water is extended through another opening in the liquid receiver, this arrangement'eiiminating the necessity for an additional fitting to 45. bring the inner tube out of the outer tube. The end of the inner tube projecting from the liquid receiver is connected to a supply of cooling wa ter, this end of the coil being the inlet end. The cooling water flows in the direction opposite to 50 the direction in which the refrigerant flows, thereby providing a counterflow arrangement as is well known in the art.

Returning to the fitting 33, the cooling water discharged from the condenser by the inner tube 55 30 is admitted to a cooling coil 35 which iswound around said end portions of reduced diameter of the motor compressor casing, being in direct contact with the outer surface of the casing and disposed interiorly of the condenser tube 38.

The cooling water discharged from the condenser,

while relatively warm, is still sufllclently cool to .maintain the motor of the motor-compressor The other.

unit at sufficiently low temperature. or discharge end of the. cooling coil 35 is con- 65 nected'to a valve 36 which controls the flow of cooling water. .The valve 36 is operated by a pressure responsive device 31, which is subjected to the pressure in the high side, or high pressure portion, of the refrigerant circuit, said pressure 70 being transmitted from the liquid receiver 34 through a tube 38. Upon increase in pressure in the high pressure side, indicating a greater demand for cooling water, the pressure responsive device 31 effects increased opening of the valve 76 36 to provide the greater flow of cooling water.

Upon decrease in pressure, the closing movement of the valve 36 is effected. The advantage of placing the valve controlling flow of cooling water at the discharge end is that the valve is subjected to the warmer temperature of the cooling water, and hence the objection of condensation forming on the valve is avoided.

The casing of the motor compressor unit has attached thereto brackets 39 for supporting the same.- Each bracket 39 has end portions 40 of inverted cup shape, in which helical compression springs 4| are mounted. These springs 4! rest on cross members 42, which are attached to vertical angle irons 43 of the inner casing Ii.

The condenser 18 is carried by the motor compressor unit 21, in this case being held between straps 44 and 45, the former being fixed on the end portions of the brackets 39.

The evaporator I4 is supplied with liquid from the liquid receiver 34 through a conduit 46 and expansion valve 41. Refrigerant vaporized in the evaporator is returned to the motor compressor unit through the conduit 3|.

From the above description, it will be seen that I have provided a simple and compact arrangement in which all of the apparatus for cooling air is embodied in a single unit, which may be a portable unit if desired.

The apparatus shown in this case effects circulation, cooling and cleaning of the air, and is also known as a room cooler. It will be understood that apparatus for effecting additional airconditioning functions may be embodied therein without departing from my invention.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications, without departing from the spirit thereof, and I desire, 4 therefore, that only such limitations shall be 4!) placed thereupon as are imposed by the prior art -or as are specifically set forth in the appended claims.

What I claim is:

1. A unit air conditioner comprising a casing having upper and lower compartments, an air cooling evaporator in the upper compartment, means for circulating air through said upper compartment in heat exchange relation with said evaporator, a motor-compressor unit disposed in 50 the lower compartment, a cooling coil disposed about the motor-compressor unit for cooling the same, and means for conveying cooling water through said coil.

2. A self-contained unit air conditioner for an enclosure comprising a casing having upper and lower compartments, an evaporator in the upper compartment, means for circulating air through said upper compartment in heat exchange relation with said evaporator, an enclosed motorcompressor unit in the lower compartment comprising a motor, a compressor driven thereby and a fluid tight casing enclosing the motor and the compressor, a cooling passage extending about said fluid tight casing for removing heat from exchange relation therewith, a condenser in the lower compartment, and means for conveying cooling fluid first through said condenser and then through said cooling coil.

4. A unit air conditioner comprising a casing having upper and lower compartments, an air cooling heat exchanger in the upper compartment, means for circulating air through said upper compartment in heat-exchange relation with said heat exchange, a motor-compressor unit disposed in the lower compartment, a cooling coil disposed about the motor in heat-exchange relation therewith, a condenser comprising a double-tube coil encompassing the motor-compressor unit, and means for conveying cooling fluid first through said condenser and then through said cooling coil.

5. A unit air conditioner comprising a casing having upper and lower compartments, an air cooling heat exchanger in the upper compartment, means for circulating air through said upper compartment in heat-exchange relation with said heat exchanger, a motor-compressor unit disposed in the lower compartment, a cooling coil disposed about the motor in heat-exchange relation therewith, a condenser carried by the motor-compressor unit, means for conveying cooling fluid first through said condenser and I then through said cooling coil, and means for resiliently supporting the motor-compressor unit.

6. A unit air conditioner comprising a casing having'upper and lower compartments, an air cooling heat exchanger in the upper compartment, means for circulating air through said upper compartment in heat-exchange relation with said heat exchanger, a motor-compressor unit disposed in the lower compartment, a cooling coil disposed about the motor in heat-exchange relation therewith, a condenser comprising a double-tube coil encompassing the motor-compressor unit and carried thereby, means for conveying cooling fluid first through said condenser and then through said cooling coil, andmeans for resiliently supporting the motor-compressor unit.

7, A unit air conditioner comprising a housing structure of horizontally elongated form and comprising upper and lower horizontally elongated compartments, an elongated motor compressor unit disposed horizontally in said lower compartment, said upper compartment having an inlet at one end and an outlet at the top thereof,

an evaporator coil disposed in said upper compartment in a direction the major component of.

which is horizontal, and means for circulating air 8. A unit air conditioner comprising a housing structure of horizontally elongated form and comprising upper and lower horizontally elon-- gated compartments, an elongated motor compressor unit disposed horizontally in said lower compartment, said upper'compartment having an inlet at one end and 'an outlet at the toptherecf, an evaporator coil disposed within said upper compartment, and means for circulating airinwardly through said inlet, in contact with said evaporator coil, and upwardly 'through' said outlet.

9. In a unit air conditioner, the combination of a housing comprising a top wall having an outlet opening therein and a plurality of vertical walls one of which has an inlet opening adjacent the top wall, a cooling coil disposed beneath said outlet and inclined downwardly in a direction away from said inlet, said coil having extended heat transfer surfacesdisposed perpendicularly thereof, and a propeller fan disposed on a horizontal axis adjacent said inlet for effecting flow of air horizontally inwardly through said inlet, obliquely over said extended heat transfer sur faces and upwardly through said outlet.

10. In a unit air conditioner adapted to be disposed within a room to be air conditioned com W prising a chamber including a top wall having an outlet therein and a plurality of vertical walls one of whichhas an inlet therein, a fan mounted on said chamber for ,eifecting circulation of air therethrough from the inlet to the outlet, a coil disposed obliquely of said chamber and intermediately of the angle between said top wall and said one vertical wall, said coil having heat transfer surfaces arranged transversely thereof to assist in changing the direction of the air from the direction in which it enters through the inlet to the direction in which it leaves through the outlet.

MILTON KALISCHER.

DISCLAIMER 2,125,727.-Milton Kalt'scher, Springfield, Mass. AIR CONDITIONING APPARATUS. Patent dated August 2, 1938. Disclaimer filed January 20, 1939, by the assignee, Westinghouse Electric ch Manufacturing Company.

Hereby enters this disclaimer to the subject matter of claim 2 in said specification except unit air conditioners wherein the cooling passage extending about the fluidtight casing is formed by a structure which is separate "from and within the lower compartment.

[Ofitcial Gazette February 14, 1939.] 

